lib/xstrndup.c

   1 /* Copyright (C) 2001 Free Software Foundation, Inc.
   2
   3    This program is free software; you can redistribute it and/or modify it
   4    under the terms of the GNU General Public License as published by the
   5    Free Software Foundation; either version 2, or (at your option) any
   6    later version.
   7
   8    This program is distributed in the hope that it will be useful,
   9    but WITHOUT ANY WARRANTY; without even the implied warranty of
  10    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11    GNU General Public License for more details.
  12
  13    You should have received a copy of the GNU General Public License
  14    along with this program; if not, write to the Free Software Foundation,
  15    Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  16
  17 #if HAVE_CONFIG_H
  18 # include <config.h>
  19 #endif
  20
  21 #if STDC_HEADERS || HAVE_STRING_H
  22 # include <string.h>
  23 #else
  24 # include <strings.h>
  25 #endif
  26
  27 #include <sys/types.h>
  28
  29 #include "xalloc.h"
  30
  31 #ifndef HAVE_DECL_STRNLEN
  32 "this configure-time declaration test was not run"
  33 #endif
  34 #if !HAVE_DECL_STRNLEN
  35 size_t strnlen ();
  36 #endif
  37
  38 char *xstrndup (const char *s, size_t n);
  39
  40 char *
  41 xstrndup (const char *s, size_t n)
  42 {
  43   size_t len = strnlen (s, n);
  44   char *new = xmalloc (len + 1);
  45
  46   if (new == NULL)
  47     return NULL;
  48
  49   new[len] = '\0';
  50   return (char *) memcpy (new, s, len);
  51 }